The Tomb (1985) [Anna Conda]: Crushed to death by a boa constrictor after Michelle Bauer throws her onto a bed of snakes. We hear the cracking noise while the camera is on Michelle, then Dawn's body is shown lying on the bed afterwards. (Nudity alert: Topless)

Armed Response (Jade Jungle) (1986) [Thug #2]: My memory of this movie is vague, but I believe she was shot to death during a gunfight.

Evil Spawn (Alien Within; Alive by Night; Deadly Sting) (1987) [Evelyn Avery]: Reportedly commits suicide by shooting herself in the mouth after being cornered by the monster. (Thanks to Jimbo)

Surf Nazis Must Die(1987) [Eva]: Reportedly decapitated, along with Barry Brenner, when they get hit by a boat while being chased by Gail Neely. (Thanks to Robert)